Channel-furnace.



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ZTIRJ XST ELIAS BRAND, @F HALSINGBORG, SWEBEN,

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Specification of letters Patent.

ZPaten-tecl an, 21, this application filed January 19, 25318, Serial 212,5G3.

To aZZ whomc't may concern:

Be it known that I, Ennsr Emits BRAND, a subject of the King of Sweden, residing atRaus Plantering, Halsingborg, Sweden, have invented new and useful Improvements in Channel-Furnaces, of which the following is a specification.

The object oi the present invention is an arrangementiof channel furnaces in such a manner that the heat of the goods treated in them can be utilized at the cooling, which is of importance, as the said goods contain very great quantities of heat, which hitherto are lost.

As known, a channel furnace as a rule con tains three compartments: the pro-heating chamber, in which the material is preheated by combustion gases from the next chamber, the combustion chamber, and the cooling chamber, in which the heated material meets and is cooled by a cold air current, which passes to the combustion chamber in which it contributes to the combustion,

Experiments have proved that the said air, passing through the cooling chamber, moves itself almost horizontally without any essential variations in a vertical direction and that it for that reason cannot come in any such intimate contact with the material .to be cooled that the heat of the said mate rial can be taken up completely or almost completely by the air. Such a complete utilization of the heat of the material to he cooled cannot be obtained by extending the channel furnace, so that a longer cooling chamber is obtained, in which the contact between the air and the material becomes longer, because the extension of the furnace in such a case should be so large that the furnace would not be economic,

According to the present invention the object aimed at-may'he reached by arranging in the roof or the walls of the cooling chamber passed by comhustion air directly from the delivering end of the furnace and above the bottom of the trucks supporting the material treated, a number of openings, communicating with a devioe for forcing air currentsinto the chamber m an angle to the current o? mentioned. By this arrang merit this lat ter current of combustion air is given such a movement that it is brought into an intimate contact with the burnt material and can take up a large part of its heat.

In the accompanying drawing the delivering end of a channel furnace accordn to the present int ion illustrated scie matically in a VEItILZll longitudinal section.

a is the furnace. and 7) the trucks for the material. According to the invention there are arranged in the roof or the walls of the furnace openings 0, through which. air, by means of for instance a ventilator, is forced into the upper channel of the furnace and thereby produces a movement in the air passing from the delivering end through that channel, so that the said air is brought into an intimate contact with material, the heat of which thereby is taken up very completely by the air,

The openings for the introduction. of air, as already mentioned, may be arranged i. the-walls of the furnace as well as in its root, and their number is of no importance, as the object is only the forcing into the furnace of air currents in an angle to the air current, passing from the delivering end oi. the furnace, and to bring it'in such a move,-

merit that it obtains a more complete (3011- i1;

tact with the goods than heretofore.

combustion air, above Having now particularly described the.

nature of my invention and the manner of its operation, what I claim is:

1. A "furnace having a channel for the re ception of material to be cooled, means for creating a draft horizontally through said is for creating air currents downwardly of said channel so to cause the same to intercept the horiwntal channel, and men.

draft at right angles whereby the horizontal draft is forced downwardly and into intimate contact with the material to becooled.

2. A furnace having a channel for the reception of material to be cooled, means for creating a draft horizontally through said channel, the upper wall of said channel being formed with openings, an air-supply pipe communicating with all of the openings in the upper Wall and means for creating an air current downwardly in said pipe where" by air currents will be supplied to said channel to force the horizontal clraftinto intimate contact with the material to be cooled.

T" memes In testimony whereof 1 have signed my name to this specification in the presence of two subscribing witnesses.

ERNST ELIAS BRAND.

Witnesses:

HENMNG MAN NERB, HUGO WENNERBTOM. 

